A patient is unable to raise the upper lip. Which of the following muscles may be damaged? (Select all that apply.)

Question

Quizplus · Accepted Answer

The levator labii superioris, zygomaticus major, and levator labii superioris alaeque nasi are all muscles that contribute to the elevation of the upper lip. Damage to any of these muscles can impair the ability to raise the upper lip. The risorius primarily affects the angle of the mouth rather than lifting the upper lip, and the orbicularis oris mainly functions to close the lips or pucker them, not specifically to elevate the upper lip.

A Patient Is Unable to Raise the Upper Lip